Do you have a link to the transcripts for Lumamba, I'll look through them? Again, I don't remember anything about being beaten. I vaguely remember an article quoting him when he was released, complaining about being put in isolation, frightened by threatening and aggressive questioning, and the fact that his bar was still shut down.
I disagree with your "furthermore" statement about Frank's complaints being related to jostling cameras near the victim's family. It seems like his complaint relates to being beaten, and threatened as I quoted above. Whether he was able to introduce into evidence the hospital records and hospital eyewitnesses is unknown.
What appears to be a fact is that after finding that Lumamba had an air-tight alibi, the police continued to shut his business down for a period of 3 months, and offered him no compensation in relation to that. Which, by itself, is egregious. If you read through the rest of the Citizen's to Protect Journalists article, they itemize numerous complaints about aggressive and threatening tactics committed by law enforcement there.